Improvement in tanning



UNITED STATES PATENT OFFICEQ It. 13. THOMPSON, OF GALESBURG, ILLINOIS.

IMPROVEMENT IN TANNING.

Specification forming, part of Letters Patent No. 2 ,800, dated January 10, 1860.

To all whom it may concern:

Beitknown that I, R. B. THOMPSON, of Galesburg, in the county of Knox, in the State of Illinois, have invented a new, Compound for Tanning Leather; and I do hereby declare that the following is a true and exact description of the same.

The nature of my invention or improvement consists in the discovery and use of the following compound, viz: root of the Polygonum bistorta, ten pounds; root of the Geranium maculatum, two pounds; sulphate of copper, one-quarter pound; one barrel weak solution catechu, tan-bark, or hot Water. After dinesting thirty-six hours I then strain or filter the decoction, and when cool it is ready for use. I prepare my hides for the tan as follows: First remove the'hair by any of the common modes. They are then submitted to the action of the compound or tan-bath until tanned, which will be accomplished in the time here specifiedealf-skins in from two to four days, and hides of any dimensions in from fifteen to twenty-five days.

I do not claim the individual use separately of the ingredients hereinbefore specified; but

What Ido claim as my invention, and desire to secure by Letters Patent, is-

The combination and use of the several ingredients, compounded in proportion as described, for the purpose of tanning leather from hides, as above set forth.

It. B. THOMPSON.

Witnesses:

ZIMRI POND, J. B. WOODRUFF. 

